核素

The transuranic elements especially the minor actinides in spent fuel represent potential environmental radiotoxicity hazard in the long term.

核电站乏燃料中超铀核素，特别是其中的少数锕系核素（Minor Actinides，简称MA），对环境具有潜在长期放射性危害性。

In order to investigate the capabilities of zircon as waste forms for immobilizing simulated trivalent actinides, trivalent europium (Eu3+) was used as the simulacrum for trivalent actinides, the waste forms containing 20 mol% Eu3+ were successfully synthesized by high temperature solid reaction and using ZrO2, SiO2 and Eu2O3 powders as starting materials.

中文摘要：为研究锆英石基三价锕系模拟核素固化体的性能，利用Eu3+作为三价锕系核素模拟替代物质，以ZrO2、SiO2和Eu2O3粉体为原料采用高温固相法制备了包容Eu3+为20mol%的锆英石基固化体。

Based on theoretical calculation and in-situ test results,distribution and emissions of radioactive nuclides of uranium tailings impoundment and waste rock pile sites are analyzed in this paper.

本文从理论计算和现场实测入手，分析了铀尾矿废石场放射性核素的分布、排放量，指出氡是铀尾矿废石场中的主要核素，是公众剂量的主要贡献者。

Conventional radiochemical methods such as alpha spectrometry, neutron activation analysis, liquid scintillation system, fission track and gamma spectrometry for the quantitative determination of neptunium and plutonium often require complicated and time-consuming sample preparation and separation procedures.

研究环境中铀、镎、钚等长寿命放射性核素的精密测定，对保护公众安全和保护环境，对了解核设施的历史操作情况和现状，都具有重要意义。环境样品基体复杂，铀、镎和钚等锕系元素含量非常低，在复杂的生态条件下，这些核素常常具有复杂多变的化学形态，要准确测定其含量，必须要有灵敏可靠的检测方法。

The procedure have very high decontamination factors of more than 2×10~(10) toαandβnuclides and more than 2×10~8 toγ-emitting nuclide ~(137)Cs.

流程去污能力非常高，对元件溶解液的总的α、β核素的去污因子2×10~(10)，对主要γ核素~(137)Cs的去污因子＞2×10~8。

According to distance protection,time protection and material protection to protect;contamination with radionuclides should be treated in accordance with its mutual imˉpaction.

放射性核素的防护应采取距离、时间、材料防护；放射性核素污染应根据污染特点进行去污处理。

Abstract］ Objective To study the clinical value of radionuclide bone marrow imaging.

目的 对鼻咽癌患者行核素骨显像，了解核素骨显像的临床价值。

Using environmental radionuclide 210Pb to study the soil erosion and sediment had great application value and potential. When the nuclide was settled on the surface with atmosphere, it was absorbed by the soil particle quickly. The soil erosion rate on the scale of 100 years was traced through the remotion of nuclide in soil and its regular distribution nude.

利用环境放射性核素210Pb来研究土壤侵蚀和沉积具有很大的应用价值和潜力，当核素随大气沉降到地表时，迅速被土壤颗粒吸附，通过其在土壤间的移动和有规律的分布模式可以示踪100年尺度上的土壤侵性速率。

In the paper, we mostly studied the change of soil erosion process by a new REE tracer method, based on the theories of hydraulic mechanical subject and radionuclear tracer method, and simulated rainfall was applied to study the sheet erosion changing to rill erosion and the rill erosion process on slope land. The new REE tracer method should be useful to future studying of erosion processes on slope lands.1. Offering and testifying a new REE displacing method to study on the soil erosion of the loess slope.

本文以黄土坡面土壤侵蚀形态演变规律为研究重点，以新的核素示踪技术为手段，采用水动力学与核素示踪技术相结合、室内人工模拟降雨与稳定性REE元素示踪相结合的方法，利用先进的INAA技术，定量研究了不同雨强次降雨条件下细沟间侵蚀向细沟侵蚀的转变过程、细沟发生发育过程，为深入了解坡面侵蚀过程，建立黄土高原土壤侵蚀预报模型提供了研究基础。

Left ventricular function in patients with anterior acute myocardial infarction with aneurysm was studied by equilibrium radionuclide ventriculography.

前壁心肌梗塞室壁瘤形成的核素心室造影中国医学科学院心血管病研究所阜外医院吴迪，刘秀杰，黄希正，马淑萍，史蓉芳，刘蕴忠，寇文镕，刘永宁，郭秀珍，吴清文摘要应用核素心室造影法对前壁心肌梗塞后室壁瘤的形成作左室功能测定。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。